The best true offroading 4x4 car is the NISSAN SUPER SAFARI (offering as much capabilities as the landcruiser VXR V8 and if not superior)! In addition, maintenance is extremly easy and cheap,and it has excellent resale value. The only thing is that it is bit more expensive than the other cars (the top super safaris are around 160k) you mentionned. As for bed space, I am not sure about it, but from my friend's super safari, I noticed that it offers plenty of space when seats are folded. As for prados and pajeros, they are good car, however they lack the powerful engines for true offroading as well as the stiff suspensions...

Obviously it's not gonna feel like u are in a royal bed! But hey, if u know big bed space, then big a 5ppl tent and just set it up next to ur car and thats a great camping experience... Otherwise, if u want true bed experience in a car, then you only have to get a YUKON XL, SUBURBAN, or Infinity QX56! But those are not 4x4 offroad cars :) :) :) !!!!

I hope that was useful